/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* SemiSupClassifierSplitEvaluator.java
* Copyright (C) 2003 Prem Melville
*
*/
package weka.experiment;
import java.io.*;
import java.util.*;
import weka.core.*;
import weka.classifiers.*;
/**
* A SplitEvaluator that produces results for a semi-supervised
* classification scheme on a nominal class attribute. Currently this
* evaluator collects the statistics as for purely supervised
* classifiers. However, it can be modified to collect more statistics
* specific to semi-supervised learning.
*
* -W classname <br>
* Specify the full class name of the classifier to evaluate. <p>
*
* -C class index <br>
* The index of the class for which IR statistics are to
* be output. (default 1) <p>
*
* @author Prem Melville (melville@cs.utexas.edu) */
public class SemiSupClassifierSplitEvaluator extends ClassifierSplitEvaluator implements SemiSupSplitEvaluator {
/**
* Gets the results for the supplied train and test datasets.
*
* @param train the training Instances.
* @param unlabeled the unlabeled training Instances.
* @param test the testing Instances.
* @return the results stored in an array. The objects stored in
* the array may be Strings, Doubles, or null (for the missing value).
* @exception Exception if a problem occurs while getting the results
*/
public Object [] getResult(Instances train, Instances unlabeled, Instances test) throws Exception{
if (m_Classifier == null) {
throw new Exception("No classifier has been specified");
}
//Modification to allow for semisupervision
if(m_Classifier instanceof SemiSupClassifier) ((SemiSupClassifier) m_Classifier).setUnlabeled(unlabeled);
return(getResult(train, test));
}
}